Effects of Ammonium Addition on Methane Oxidation in a Paddy Soil: Insights Into Microbial Interactions DOI
Huabin Li, Xian Wu, Jin‐Li Hu

и другие.

European Journal of Soil Science, Год журнала: 2025, Номер 76(2)

Опубликована: Март 1, 2025

ABSTRACT Rice paddies are a major anthropogenic source of methane and key target for reducing emissions the greenhouse gas to atmosphere. The delicate equilibrium between production oxidation in paddy soils is shaped largely by abundances compositions different microbial communities within soil ecosystem interactions them. Ammonium addition can alleviate nitrogen deficiency methanotrophs, but ammonium also inhibit their growth when present excess. However, threshold concentration this switch not currently known. Here we report results nine‐day laboratory incubation experiment that sought examine effects increasing concentrations on rice at refined intervals. We measured rates analysed gene community methanotrophs ammonia oxidizers incubated decode these communities. Our showed an 10 mg ‐N d.w.s stimulated oxidation, above 30 kg −1 inhibited rate. At lower concentration, type Ia appeared outcompete nitrogen; however, was reversed higher where proliferation stimulated. show how ammonia‐oxidizing bacteria (AOB) greater extent than archaea (AOA), with much smaller changes specific AOB composition, compared AOA findings highlight as factor regulating interaction identify shifts from promoting inhibiting oxidation.

Язык: Английский

Short-term nutrient addition improves soil organic carbon accumulation in tropical forest DOI Creative Commons

Tianyan Su,

Yamin Jiang,

Huaying Chen

и другие.

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Янв. 6, 2025

Abstract Background and Aims: Highly weathered tropical forests are widely recognized as nitrogen (N)-rich phosphorus (P)-poor, the input of nutrienteffects soil carbon (C) cycling storage in these ecosystems. In topsoil, short-term nutrient additionmay not only effect organic C (SOC) pools directly, but also impact conversion process indirectly through altering microbial use efficiency (CUE). However, effects addition on accumulation mechanisms remain unclear. The aim this study was to clarify SOC responding addition. Methods: This conducted a one-year N P additions experiment forest Hainan, China. SOC, fractions (POC MAOC), biomass, enzyme activities, physicochemical properties at depths 0–10 cm, 10–20 cm 20–40 were measured. Results: results showed that increased (8.91–20.03%), POC (6.65–24.90%), MAOC (8.74–19.89%) topsoil (0–10 cm), whereas no significant changes occurred subsoil (20–40 cm). Pearson’s correlation analysis revealed litter biomass CUE significantly positively correlated with SOC. partial least squares-path model influences by characteristics. Conclusions:These suggested decreased activities. Such information could provide insight understand pool forest.

Язык: Английский

Процитировано

0
Improved Microbial Carbon Use Efficiency With Low Tillage Intensity: Evidence and Research Gaps DOI Creative Commons

Lasse Busk Holm,

Lars Elsgaard, Mingming Zong

и другие.

Journal of Sustainable Agriculture and Environment, Год журнала: 2025, Номер 4(1)

Опубликована: Фев. 5, 2025

ABSTRACT High microbial carbon use efficiency (CUE) in agricultural soils can limit the return of atmospheric dioxide (CO 2 ) from organic matter mineralisation and potentially increase soil (SOC) accumulation through formation biomass necromass. Therefore, management practices that CUE are relevant for sustainable agriculture climate change mitigation. We conducted an exploratory literature review evidence synthesis to compare between conventional tillage (CT) low‐intensity systems (reduced tillage, RT no‐tillage, NT). The 50 paired observations 11 studies showed overall 12% under compared CT ( p = 0.02). Separate contrasts NT versus (i.e., RT/CT NT/CT) also higher with 0.06 0.05, respectively. is likely due improved substrate availability growth and/or changes community induced by contrasting systems. However, limited quantitative data linking tillage‐induced these drivers constrains further analysis. extracted available SOC eligible studies, but this did not provide increases were correlated content. Future should extend emerging empirical set clarify abiotic biotic which be refined better mitigation strategies. Further aim understand link dynamics, important representation global models.

Язык: Английский

Процитировано

0
The Addition of Straw Affects the Response of Labile Soil Organic Carbon to the Freezing and Thawing Process DOI Creative Commons
Mengmeng Zhu, Qiang Ma, Shuailin Li

и другие.

Agronomy, Год журнала: 2025, Номер 15(2), С. 479 - 479

Опубликована: Фев. 17, 2025

Global warming alters freeze–thaw process frequency and intensity, impacting soil carbon cycles. Four soils from a 12-year straw return experiment were used: S0 (no straw), S1 (low rate of addition), S2 (medium rate), S3 (high rate). Ten treatments with or without temporary addition at different rates conducted to explore their effects on microbial biomass (MBC) dissolved organic (DOC) under laboratory field conditions. Compared constant temperature, the conditions reduced MBC (5.79%~29.9%), whereas this trend was mitigated reversed The alleviating effect decrease in greater than S1, S2, by an average 31.7%. Medium application (S2 8 t/ha) provided appropriate labile C levels, enhancing activity while keeping DOC low reducing loss risk. results revealed discrepancies OC between conditions, mitigation impacts addition, Liaohe Plain. Therefore, proper nutrient management can maintain regulate areas

Язык: Английский

Процитировано

0
Contrasting Exogenous and Endogenous Soil Microbial Carbon Use Efficiencies Under Global Changes DOI Open Access
Sun Xiao-dong, Chenyang Zhang, Zhenghu Zhou

и другие.

Global Ecology and Biogeography, Год журнала: 2025, Номер 34(4)

Опубликована: Март 31, 2025

ABSTRACT Aim Microbial carbon use efficiency ( CUE ) is one of the key indicators for formation and release soil carbon. can be divided into exogenous ex , in using external sources measured by e.g. 13 C or 14 labeling) endogenous en internal 18 O labeling). Global changes strongly influence CUE, which response depends on source. However, effect size drivers responses to global remain unclear, leading large uncertainties when forecasting terrestrial cycling. We aimed quantify magnitude direction microbial changes. Location Global. Time Period 2011–2024. Major Taxa Studied Soil microorganisms. Methods Database containing 213 paired 155 data was integrated meta‐analysed assess impacts change factors CUE. Additional information gathered encompassed latitude, longitude, climate, plant properties, properties experimental conditions. Results found that decreased with absolute while showed opposite trend. Warming reduced 3.6% 16.5%, respectively. Drought increased 7.9%, but 14.3%. Nutrient inputs consistently 5.0%–17.1%, nitrogen combined phosphorus potassium 25.5% 43.1%, Aridity index, pH cation exchange capacity were main influencing . In contrast, respiration growth rates, followed biomass, major predictors Main Conclusions Biogeochemical models should account spatial patterns as well their respective specific under changes, accurately predict various sources.

Язык: Английский

Процитировано

0
Effects of Ammonium Addition on Methane Oxidation in a Paddy Soil: Insights Into Microbial Interactions DOI
Huabin Li, Xian Wu, Jin‐Li Hu

и другие.

European Journal of Soil Science, Год журнала: 2025, Номер 76(2)

Опубликована: Март 1, 2025

ABSTRACT Rice paddies are a major anthropogenic source of methane and key target for reducing emissions the greenhouse gas to atmosphere. The delicate equilibrium between production oxidation in paddy soils is shaped largely by abundances compositions different microbial communities within soil ecosystem interactions them. Ammonium addition can alleviate nitrogen deficiency methanotrophs, but ammonium also inhibit their growth when present excess. However, threshold concentration this switch not currently known. Here we report results nine‐day laboratory incubation experiment that sought examine effects increasing concentrations on rice at refined intervals. We measured rates analysed gene community methanotrophs ammonia oxidizers incubated decode these communities. Our showed an 10 mg ‐N d.w.s stimulated oxidation, above 30 kg −1 inhibited rate. At lower concentration, type Ia appeared outcompete nitrogen; however, was reversed higher where proliferation stimulated. show how ammonia‐oxidizing bacteria (AOB) greater extent than archaea (AOA), with much smaller changes specific AOB composition, compared AOA findings highlight as factor regulating interaction identify shifts from promoting inhibiting oxidation.

Язык: Английский

Процитировано

0